Berlin 2018 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 78: Hybrid and Perovskite Photovoltaics II
CPP 78.8: Talk
Friday, March 16, 2018, 11:30–11:45, C 264
LASER PATTERNING OF PEROVSKITE SOLAR CELLS FOR MINI-MODULE FABRICATION — •Christof Schultz1, Felix Schneider1,2, Marko Jost3, Lukas Kegelmann3, Andreas Bartelt1, Bernd Rech4, Rutger Schlatmann1,2, Steve Albrecht3, and Bert Stegemann1 — 1HTW Berlin - University of Applied Sciences, Wilhelminenhofstr. 75A, D-12459 Berlin — 2Helmholtz-Zentrum Berlin für Materialien und Energie, PVcomB, Schwarzschildstr. 3, D-12489 Berlin — 3Helmholtz-Zentrum Berlin, Nachwuchsgruppe Perowskit Tandemsolarzellen, Kekuléstraße 5, D-12489 Berlin — 4Helmholtz-Zentrum Berlin, Institut für Silizium-Photovoltaik, Kekuléstraße 5, 12489 Berlin
Metal halide perovskite (MHP) solar cells have been rapidly improved over the last years. Successful up-scaling from lab-scales to large module sizes requires monolithical interconnection processes. Here we report on laser scribing processes of the P1, P2 and P3 patterning steps to interconnect perovskite solar cells for module fabrication. Particular emphasis is put on the P2 laser patterning step as it is known to induce detrimental material modifications of the absorber layer mostly at the bottom and in the vicinity of the scribed lines. By systematic variation of the pulse length (ns, ps), the wavelength (1064 / 532 / 355 nm) and the processing side (glass-/ layer-side) suitable process windows were established and optimized. Based on systematic analysis of the laser-matter interaction the selective layer removal, the proper morphology and the electrical functionality were elucidated allowing successful fabrication of a mini-module.